Made in the USA! New in Factory Packaging. Measurements: --Length: 11 - 5/8" (11 5/8") --Outside Diameter: 5" (5") --Top Opening: 2 - 1/8" (2 1/8") --Bottom Opening: 2 - 1/8" (2 1/8") Popular brand part numbers: --Unicel - C-4340 (C4340) --Filbur - FC-3081 (C3081) --Pleatco - PMT-40 (PMT40) Replaces the following filters: --DIMENSION ONE SPAS --MARTEC --1561-03 --APCC7127 --14009 --17-175-1213 Manufacturer of this cartridge: --Guardian Filtration Products (USA) --Part number 411-197